Electric jack



H. iv. MOORE ET AL.

ELECTRIC JACK Filed Feb. 17, 1922 INVENTORS 46y mjwaafie W6? Aqua mznaaiwr ATTORNEY tive for the purposes Patented Apr. 10, 1923.

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.HARVEY w. MOORE AND CHARLES H. soHUMAoHER, or STOCKTON, CALIFORNiA. H

ELECTRIC JACK.

Application filed February 17, 1922. Serial No. 537,209.

To all: whom it may concern:

Be it known that we, HARVEY XV. Moonn and CHARLES H. SCHUMACHER, citizens of the United States, residing at Stockton, county of San Joaquin, State of California, have invented certain new and useful 1mprovements in Electric Jacks; and .we do declarethe following to be a .full, clear, and exact description of the same, reference being had to the accompanyingdrawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to improvementsin jacks such as are used for raising automobile-wheel axles for tire changing and similar purposes, the principal object of our invention-being to provide such a jack which is electrically driven, the power being derived from an ordinary storage-battery such as is carried as standard equipment on most makes of cars,0r which,-if missing, can-be easily installed for the purpose.

Another objectis to provide means for enabling the jack to be positioned under an axle without the necessity of the operator stooping or kneeling 0n the ground'to place the jacka feature which will be readily appreciated by those who have hadoccasion to make tire changes on wet or muddy roads.

By means of our improved jack, an axle may be raised or lowered much faster than is possible with a manually operated jack, and without any physical effort on the part of the operator being necessary.

At the same time, our new jack weighs but little if any morethan the ordinary type of jack of a corresponding power.

A further object of the invention is-to produce a simple and inexpensive device, and yet one which will beexceedi-ngly effecfor which it is designed. I

These objects we accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of Fig. 3 is a detached fragmentary and sectional view of a handle connect-ion.

Fig. 4: is a fragmentary sectional view-of the jack-stem and its driving gear.

Referring now more particularly tothe characters of reference on the drawings, the numeral 1 denotes a base, projecting upwardly from which is atubul'arpedestal 2 projecting from one'side of which adjacent the upper end thereof-is-a casing 3, in which .is mounted an electric motor '(not shown) this motor being of anystandard form and deslgned to operate on a six-volt'circuit, this being the voltageof nearlyall automobile storage batteries. The current-carrying cable 4 of the motor projects fromthe casing 3 at any suitable point, and preferably has on its outerend a socketzmember '5 of suitable form, and adapted to be 'quickly at- ;tached to or detached from the battery leads. A switch is also preferably placed in the circuit atsome convenient point. The shaft 6 of the motor lies in a plane parallel tothe pedestal, and carries" on its upper end, above the casing 3, .a pinion 7.

The jack stem 8 carrying a pad 9on its upper end .is mounted in the" pedestal for vertical movement,.and:is held-against turning by reason ofa cross pin l0slidable in a vertical slot :11 injthe pedestal. The stem 8 is threaded forthegreaterportion ofitfs length as ati8 and engagingsaid threaded portion is a gear'12' and pinion 13, the for- ,mer being abovethe other, and either rigidly connected or formed integrally.

The gear .12 is enmeshed with a pinion 1.4; and the pinion 13 with agear 115, both members 14 and 15 being journaled on oppositely disposed but integrally-formed horizontal arms 16 .and 17 respectively, turnably mounted on the stem 8, on the'hub 13',bf the pinion 13, as shown in Fig. 14, or in any other similar and suitable manner. Likewise journaled on the arm 16 and meshing with a pinion 14 is a gear 18, adapted to mesh with the motor-pinion 7, while the gear 15 is also adapted tomes'h with the pinion 7, but only when the gear 18 is not in mesh therewith. c

By means of this geararrangement, when the pinion 7 and gear 18 are inmesh, the gear 12 will be moved in one directions causing the stem 8 to move vertically ina directiondepending on the direction of pitch of the threads 8 and the direction of rotation of the gear .12. T i 7 When the pinion .7 .is' in mesh with the 'motorwill be under no great strain at any time. p

The various gears are enclosed in a removable cover 19, adapted to be secured to a flange 3*, extending about the motor-casing and pedestal at the upper end thereof, the stem 8 of course projecting through the casing.

The gear and pinion member 12-13 is held between the top of the pedestal and cover,-so that it can have no vertical movement. All the gears and pinions are preferably provided with annular thrust ball or roller bearings wherever the use of such is desirable or necessary.

Thearms 16 and 17 are moved in unison to alternately place the gears and 18 in mesh witht-he pinion 7, or hold them both out of mesh, by means of the following structure: Formed with the arms and projecting in a direction opposite to and therebetween' is an arm 21, on and extending beyond the outer end of which are formed a pair of spaced lugs 22 provided with alined and horizontally slotted holes 23 in which rides a pin 24 fixed transversely in the head 25 of a handle member 26, the head being positioned between the lugs.

The head 25-has a fixed dog or catch portion 27 thereon adapted to pass under and engage the arm 21 when the pin 24 is moved to the adjacent end of the slot 23, the catch 27 being so positioned relative to the direction of the handle that it will firmly engage the arm 21 when the handle is set with a suitable upward slant, as shown in Fig.

By means of this construction, when it is desired to place the jack under an axle or other part, the handle is manipulated to cause the engagement of the catch with the plate in the manner described, and if the handle is firmly supported by the operator, the jack will be held in a substantially vertical position, and-cannot tip even if not resting on the ground,- and so may easily be moved into position without necessitating stooping down on the part of the operator.

At the same time, when the pin 24: is moved to the outer end of the slot, the catch 27 will be free of the arm 21, and the handle may then be freely turned. up or down, with the definite purpose of enabling it to be set in vertical alinement with the pedestal 2, as shown in Fig. 1, so that it will occupy a minimum of space.

The ordinary height of such a jack however is not sufficient to thus accommodate a handle of the length necessary to be used as we desire and intend. The main handle member 26 is therefore provided with telescopic sleeve portions 28, by means of which the handle may be extended to any desired length.

When the device is in position, by moving the handle to one side or the other,'the various gear-trains may be moved to cause the stem 8 to move up or down, which movement of the handle is the only manual effort necessary on the part of the operator to work the jack. To prevent undue movement of the handle which would cause the alternately meshed gears to bind, stop pins 29 are arranged inside the cover 19 and positioned to be engaged by the arms 16 and 17 to limit their movement.

From the foregoing description'it will be readily seenthat we have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detai the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described our invention, what we claim as new and useful and desireto secure by Letters Patent, is

1. A jack including a pedestal, a raisingstem mounted therein for vertical movement, electrically operated means for moving the stem, a handle for the jack permanently mounted thereon, and means controlled by movement of the handle for causing the stem to be moved in either direction.

2. A ack including a pedestal, a raising stem mounted therein for vertical movement, electrically operated means for moving the stem, a handle for the jack permanently mounted thereon, and means controlled by movement of the handle for causing the stem to be moved in either direction, Without reversing said operating means.

3. A jack including a pedestal. a raisingstem mounted therein for vertical movement, a driven shaft mounted with the ped estal, a gear member threaded onto the stem and held against vertical movement, and independent operative connections arranged with said gear member and adapted to be alternately connected with the shaft, the connections causing the gear member to be rotated in opposite directions with a common direction of rotation of the shaft, and means operable from beyond the pedestal for so shifting the connections.

4:. A jack including a pedestal, afraising-stem mounted therein for vertical movement, a driven shaft mounted with the pedestal, a gear member threaded onto the stem and held against vertical movement, and independent operative connections arranged withsaid gear member and adapted to be alternately connected with the shaft, the

connections causing the gear member to be rotated in opposite directions with a common direction of rotation of the shaft, a handle for the jack extending away from the pedestal, and means controllable from and by the handle for shifting the connections.

5. A jack including a pedestal, a raisingstem mounted therein for vertical movement,

a driven shaft mounted with the pedestal, a gear member threaded onto the stem and held against vertical movement, a pinion on the shaft, gear means meshed with the gear member and adapted to be meshed with the pinion, gear means meshed with the first named gear member and likewise adapted to be meshed with the pinion when the first named gearing is out of mesh therewith, said last named gear means being arranged to cause a reversal of movement of the first named gear member from that had with the first named gearing.

6. A jack including a pedestal, a raisingstem mounted therein for vertical movement, a driven shaft mounted with the pedestal, a gear member threaded onto the stem and held against vertical movement, a pinion on the shaft, gear means meshed with the gear member and adapted to be meshed with the pinion, separate gear means meshed with the first named gear member and likewise adaptd to be meshed with the pinion when the first named gearing is out of mesh therewith, said-last named gearmeans being arranged to cause a reversal of movement of 1 the first named gear member from that had with the first named gearing, and means controllable at Will for moving either gear means into engagement with the pinion.

7 A jack including a pedestal, a raisingstem mounted therein for vertical movement, a driven shaft mounted with the pedestal, a gear member threaded onto the stem and held against vertical movement, a pinion on the shaft, an arm member pivoted concentric with the stem, gear means on the arm and in mesh with the first named gear member and adapted to be meshed with the pinion, separate and spaced gear means on the arm meshed with the first named gear member and adapted to be meshed with the pinion when the other gear means is out of mesh therewith, and means for moving said arm member to cause engagement of either gear means with the pinion.

8. A jack including a pedestal, a raising-- stem mounted therein for vertical movement, a driven shaft mounted with the pedestal, a gear member threaded onto the stem and held against vertical movement, a pinion on the shaft, an arm member pivoted concentric with the stem, gear means on the arm and in mesh with the first named gear member and adapted to be meshed with the pinion, separate and spaced gear means on ack.

to the handle will cause the arm member to i be moved about its shift the gear means.

9. In a jack, a handle member for the same, means whereby the handle may be moved to lie in a vertical plane alongside the jack, and means whereby when the handle is raised the jack may be supported at a definite angle with respect to the handle.

10. In a jack, an arm, a pair of lugs projecting therefrom andprovided with horizontal and alined slots, a handle passing between the lugs and having a transverse pin passing through the slots and a catch member fixed with the handle-end beyond the pin and adapted to pass under and engage the arm when the handle is raised a predetermined amount and the pin is moved toward the end of the slots adjacent the arm.

11. In a jack, an arm, a pair of lugs projecting therefrom and provided with horizontal and alined slots, a handle passing between the lugs and having a transverse pin turnably and slidably mounted in the slots, and a catch member on the handle-end beyond the pin and adapted to pass under and engage the arm when the handle is raised a predetermined amount and the pin pivotal connection to is moved toward the end of the slots adjacent the arm; said catch being freed from the plate when the handle is moved to draw the pin toward the outer end of the slots whereby the handle may then be freely moved about the pin as an axis.

12. In a jack, an arm, a pair of lugs projecting therefrom and provided with horizontal and alined slots, a handle passing between the lugs andhaving a transverse pin passing through the slots and a catch member fixed with the handle-end beyond the pin and adapted to pass under and engage the arm when the handle is raised a pre determined amount and the pin is moved toward theend of the slots adjacent the arm and means whereby the handle may]. also be moved to lie in a vertical plane alongside the 13. In a jack, a vertically immovable member mounted therewith, a handle pivoted-on said member, for rotative movement in a vertical plane, and means between the handle and said member whereby with a certain" position of the handle itmay be rigidly held against downward movement.

In testimony whereof we aflix our signatures.

HARVEY W. MOORE. CHAS. H. SCHUMACHER. 

